Flour-bolt



(No Model.) 2.S heetsShee t 1..

C. A. SGHIED. FLOUR BOLT.

No. 446,155. Patented Feb. 10,1891.

UNITE STATES ATENT O FICE.

CHARLES ,A. SOHIED, OF ROCHESTER, NEN YORK.

FLOUR-BOLT.

SPECIFICATION forming part of Letters Patent No. 446,155, dated February 10, 1891, I

Application filed November 26, 1890. Serial No. 372,722. No model.)

, panying this application.

My improvement relates to that class of flour-bolts in which a rotary beater is usedinside the screen for the purpose of driving the flour through the screen while the tailings are carried off at the end. In the presentinstance the beater consists of thin slats attached to spiders or heads at opposite ends, and one of these heads rests loosely on the shaftand can be turned axially in order to twist the slats more or-less, thereby varying the intensity of the blast that forces the flour through the meshes of the screen.

The invention consistsin the combination, with the thin slats and the loose head,of certain devices for allowing the turning the loose head and securing it fast in place at any adjustment, as hereinafter described.

In the drawings, Figure 1 is a central longitudinal vertical section of the machine. Fig. 2 is avertical cross-section of the same in line 00 0c of Fig. 1. Fig. 3 is a diagram showing an enlarged plan view of a part of the shaft and the devices forlocking the turning head. Fig. 4 is a central vertical section of Fig. 3. Figs. 5 and 6 are perspective views of a portion of the two sets of wings used on the beater.

A indicates the frame of the machine, in

which is horizontally mounted a screen B, which maybe either revolving ornon-revolv- 111g.

0 is the beater located inside the screen. This beater is attached to a shaft D by means of spiders or heads E E and revolves with the shaft. In case the screen is made revoluble it is connected by heads F F with a hollow shaft G, which rests and turns on the shaft D. The material is placed in ahopper H and fed down into a cylinder 1, where it is forced for ward into one end of the screen by a screw conveyer a, attached to the hollow shaft G inside the cylinder. From this end of the screen the material is gradually worked forward to the opposite end, the fine flour being forced through the screen by the action of the beater, and the tailings being discharged at the end of the screen into a passagehwhere they fall below.

The beater consists of the two heads E E and a set of slats K K and K K, extending from head to head and attached to lugs c c at the ends of the arms. Each alternate wing K consists of a single slat, while each intermediate wing K consists of three thin slats ff f, of half the width of the others and provided with projecting pins 02 d, as shown. The slats are all made so thin and flexible that they will readily bend or twist by the turning of the loose head E. Said head E rests loosely on the shaft, so as to be turned in either direction. At its back is a shoulder h, Figs. 3 and 4, on the shaft, which keeps it from sliding endwise thereon, and in front are two splines or feathers t' t', on which slides a coupling-head 70. The contiguous ends of the coupling-head and the hub of the spider have ratchet-teeth l l, which interlock when the parts are brought together, thus securing the spider in place and preventing it from turning. m is a fiat spring attached to shaft D, extending into a slot mmade in the coupling and entering a socket 0 of the coupling, thereby preventing end movement of the coupling. I

By the means above described the head E can be turned to any desired degree, the other head E remaining rigid, and thus a twist can be given to the slats K K',which are flexible enough for the purpose. To turn head E the coupling 70 is simply drawn back to disengage the ratchet-teeth, and when the adjustment has been made said coupling is pressed up to place again and locked by means of the spring. This is a convenient means for doingthe work, as the coupling is readily reached by inserting the hand between the slats. The object of thus twisting the wings of the beater is to vary the force of the blast produced by same to drive the flour outward through the meshes of the screen. The tendency of the twisted wings is to produce a longitudinal current of air through the screen, thus facilitating the passage of the material to the discharge end and at the same time an outward current that forces the fine flour through the meshes. The Varying of the twist produces more or less of this action. The pins cl cl serve to break up lumps and disintegrate the mass. 7

P is a conveyer located in the bottom of the machine and serving to convey the flour to separate discharge-openings 1; 1", where it is claim, simply and broadly, slats connecting the heads capable of being twisted to modify the blast.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

The combination,with the beater 0, consisting of one stationary and one turning head and connecting-slats, ot' the coupling 70, sliding on the shaft D, provided with teeth that engage with teeth of the turning head, and the spring on, attached to the shaft and locking the coupling in place, as herein shown and described.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

CHARLES A. SCIIIED.

Witnesses:

- R. F. OSGOOD,

WM. J. MOPHERSON. 

